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The APPLETON KC-400 is a 4-inch, 4-screw flexible conduit connector designed for securing flexible metal conduit to enclosures, junction boxes, and electrical panels. The four-screw clamping design distributes clamping force evenly around the conduit, providing a secure mechanical connection and reliable ground continuity. This type of connector is a standard component in commercial and industrial electrical installations where flexible conduit terminations are required at equipment, motor, or panel connections. Licensed electricians and electrical contractors are the primary installers of this fitting.
The KC-400 is suited for use in commercial, industrial, and heavy-duty residential electrical systems where 4-inch flexible metal conduit must be terminated at an enclosure knockout. It is commonly installed at motor terminations, switchgear connections, and anywhere vibration isolation between rigid conduit runs and equipment is needed. The 4-screw clamp style is well recognized in panel and enclosure work for its secure hold on larger conduit diameters.
Designed as an OEM-style fitting for use with 4-inch flexible metal conduit in commercial and industrial electrical installations.
Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the circuit before beginning work at any enclosure or panel. Insert the connector through the knockout, seat the conduit fully into the clamp, and tighten all four screws evenly to ensure a secure mechanical and electrical connection. Do not overtighten to the point of deforming the conduit jacket.
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